#include <unistd.h>
#include <stdexcept>

#include "pipe.h"
#include "utils.h"

PosixPipe::PosixPipe(int flags)
{
    if (flags == 0)
    {
        ENSURE(pipe(fd));
    }
    else
    {
        ENSURE(pipe2(fd, flags));
    }
}

PosixPipe::~PosixPipe()
{
    (void)close(fd[0]);
    (void)close(fd[1]);
}

int PosixPipe::operator[](int x)
{
    if (x == 0 || x == 1)
        return fd[x];
    else
        throw std::invalid_argument("Pipe file descriptor index number can't be greater than 1.");
}